Trying to start the PHP-FPM support for nginx in plesk:

Error: Unable to make action: Unable to manage service by phpinimng: [18-May-2015 09:13:30] ERROR: unable to bind listening socket for address ‘127.0.0.1:9000’: Address already in use (98)
[18-May-2015 09:13:30] ERROR: FPM initialization failed
Failed to start php-fpm service
(‘–type=fpm’, ‘php-fpm’)

Check for the process running:

# netstat -tulpena | grep 9000
tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN 0 1005390944 30929/php-fpm

Kill the process and then restart the PHP-FPM support for nginx in Plesk

kill -9 processid